Reviewed are findings on misconceptions in mechanics and their instructional implications. Many misconceptions are widespread and resistant to change but students have useful intuitions and reasoning processes that could be used more fully. One strategy for dealing with misconceptions is described. It stresses anchoring intuitions, analogical…

To investigate the origins and nature of intuitive obstacles affecting the learning of elementary probability theory, 618 Italian elementary and middle school students were interviewed about their methods of solution for several problems dealing with probability. The discussion focuses on four varieties of obstacles to learning prevalent within…